set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

An AM broadcasting station has a vertical telescopic transmitting antenna and a receiver has a vertical telescopic antenna. The receiver will respond to:

a) Magnetic component of the electromagnetic wave produced by antenna

b) Both electric and magnetic components of the electromagnetic wave produced by antenna

c) Electric component of the electromagnetic wave produced by antenna

d) 50% of both components of the electromagnetic wave produced by antenna

Question : 2

Consider the following statements :

1. Short wave bands are used for transmission of radio waves to a large distance.
2. Short waves are reflected by ionosphere.
3. A pure semiconductor has negative temperature coefficient of resistance.

a) 2 and 3

b) 1 and 3

c) 1 and 2

d) 1, 2 and 3

Question : 3

a) (A) → (2); (B) → (1); (C) → (4); (D) → (3)

b) (A) → (3); (B) → (1); (C) → (2); (D) → (4)

c) (A) → (3); (B) → (2); (C) → (1); (D) → (4)

d) (A) → (4); (B) → (2); (C) → (3); (D) → (1)

Question : 4

________ is used as a fuel in space ships.

a) Alcohol

b) Petrol

c) Hydrogen

d) Diesel

Question : 5

Einstein’s photoelectric equation states that hν = $W_0 + E_k$ in this equation, $E_k$ refers to the

a) Mean kinetic energy of the emitted electrons

b) Maximum kinetic energy of the emitted electrons

c) Kinetic energy of all the emitted electrons

d) Minimum kinetic energy of the emitted electrons

Question : 6

The active component in an IC are

a) Capacitors

b) Transistors and diodes

c) Resistors

d) None of these